violoncellos often play the same line an octave higher, or a different melodic or rhythmic part which is not a bassline when double basses are used; basso ripieno; that bass which joins in the full passages of a composition, and, by its depth of tone and energy of stroke, affords a powerul contrast to the lighter and softer passages or movements.

In some 20th and 21st century pop genres, such as 1980s pop, hip hop music and Electronic Dance Music, the bass role may be filled with a bass synthesizer.

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